A deeply emotional tale of four mother-son pairs enjoying a hot spring trip alone together. Despite their differing circumstances, each mother embraces her identity as a woman and each son steps across the forbidden line as a man, sharing intense, intimate moments. Yielding to their desires amid overwhelming guilt, the mothers open themselves to their sons. Enthralled by these acts, the sons' minds spiral out of control. A work that captures hidden emotions where warmth and passion intertwine.